I didn't know a click delay was instituted, but the last few days I've been playing a lot after taking a break and I kept thinking "man, I don't remember the game not letting me click a new card for so long." It's definitely noticeably, and extremely annoying. I end up clicking like 12 times to burrow 3 Shriekers. And Bloodsuckers are just a nightmare, where I can click on them, move the mouse, and click the creature and it STILL hasn't been enough time for it to register. It definitely feels like it takes longer to play a match because so many of my clicks don't go through.